Nancy and Donald Clayton on belated honeymoon in Paris, May 12,
1983. This was part of a three-week visit May 9-31 to the Institut
d'Astrophysique at the invitation of Jean Audouze. Claytons stayed in
the institute apartment on its top floor. Clayton's invited lecture at
the institute during that stay was "Discovery of s-Process in
carbonaceous residues of meteorites". (ApJ 271, L107 (1983)).